EP3790704B1 - Variable length protective cover - Google Patents

Variable length protective cover Download PDF

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Publication number
EP3790704B1
EP3790704B1 EP19722886.9A EP19722886A EP3790704B1 EP 3790704 B1 EP3790704 B1 EP 3790704B1 EP 19722886 A EP19722886 A EP 19722886A EP 3790704 B1 EP3790704 B1 EP 3790704B1
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EP
European Patent Office
Prior art keywords
fold
folds
protective cover
variable
cover according
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EP19722886.9A
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German (de)
French (fr)
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EP3790704C0 (en
EP3790704A1 (en
Inventor
Matthias May
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Hema Maschinen und Apparateschutz GmbH
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Hema Maschinen und Apparateschutz GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/08—Protective coverings for parts of machine tools; Splash guards
    • B23Q11/0816—Foldable coverings, e.g. bellows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/08—Protective coverings for parts of machine tools; Splash guards
    • B23Q11/0825—Relatively slidable coverings, e.g. telescopic

Definitions

  • the invention relates to a variable-length protective cover which has at least one fold element with a plurality of folds, the fold element having folds formed at regular intervals as intermediate folds, which consist of two fold layers lying flat on top of one another of a fold with a bend point and on which lamella elements are fixed, which are L-shaped in cross section, with one leg being fixed to the intermediate fold, while the legs overlap telescopically.
  • Such a protective cover is from a special embodiment DE 10 2016 103 985 A1 known.
  • the slats are attached between the pocket-like fold layers of the shortened intermediate folds of the fold element, ie the slats also overlap on the side of the protective cover on which the regular folds of the fold element are arranged, while the intermediate folds protrude freely outwards.
  • This embodiment already makes it possible to securely attach the slats directly to the folding element.
  • the arrangement in the pockets then requires more complex production of the protective cover.
  • the intermediate folds can usually only be fully formed then if the slats are also inserted and fixed in the resulting pockets.
  • variable-length protective cover in which the attachment takes place on rigid intermediate elements, to which sections of folds of the fold element as well as the legs of slats are attached.
  • the DE 20 2009 006 306 U1 shows a protective cover with a bellows with rigid intermediate elements, to which cantilevered slats are attached on both sides, which help to reduce the deflection of the curtain.
  • the DE 16 66 445 U shows two bellows elements without protective slats, which are connected to each other at the front.
  • the EP 1 842 620 A1 shows a bellows in which sections of the folds are connected to intermediate wall elements.
  • the DE 20 2017 004 433 U1 shows a protective device having a plurality of slats and a shielding member made of elastic fabric attached to the slats in connecting end portions.
  • the object of the invention is to create a protective cover that can cover a maximum stroke with a certain number of slats.
  • the object is achieved according to the invention in that regular folds (14) are formed between the intermediate folds (16) and the intermediate folds (16) have the same edge length as the remaining regular folds of the fold element.
  • This has the advantage that standard folds of the fold element can be used, in which all folds are formed the same in the initial state.
  • the intermediate folds are then made, by connecting certain fold layers, preferably the adjacent fold layers of every second fold of the folded starting material, flat to one another.
  • connection can preferably be carried out in such a way that the fold layers of the intermediate folds are sewn, glued, welded or riveted together.
  • the protective cover does not have sufficient inherent rigidity or the provision of sliding elements for interaction with guide tracks, which can be provided at the edges of the opening to a working space of a machine tool, it is provided in a further embodiment of the invention that at the intermediate folds Frame elements are attached.
  • connection of the slat elements or of any existing frame or support elements to the pleated element can be achieved in such a way that the slat elements and/or the frame elements are glued, riveted, clipped, riveted or welded to the pleated element in the area of the bends at the intermediate folds.
  • the material of the at least one fold element is formed in one or more layers from fabric and/or plastics and/or mixed forms of fabrics and plastics.
  • the fold element is designed as a bellows which extends over the entire surface of the protective cover.
  • This solution has the advantage that the lamella elements facing a working space are completely covered from the outside by the bellows. This additionally protects the environment against escaping substances, and in order to further improve this property it is particularly preferred that the fold element is free of openings or holes.
  • the protective element is designed without the otherwise usual pull-out safeguards, which protect the lamella elements from being pulled apart excessively, with the regular folds of the fold element acting as a pull-out limiter in the maximum extended position of the protective cover.
  • the regular folds fold back together even after maximum stretching due to the elastic properties of the material when the length of the protective cover is shortened.
  • the protective cover can be designed overall with a minimum number of folds and intermediate folds, so that not only the weight but also the manufacturing costs can be minimized.
  • An embodiment of the invention has proven to be particularly useful, in which every second fold of the fold element is designed as an intermediate fold. However, embodiments are also possible in which only every third or fourth fold is designed as an intermediate fold.
  • a variable-length protective cover 10 is shown, as used to cover work spaces of machine tools (not shown).
  • the length of the protective cover 10 can vary between being maximally compressed and maximally pulled apart Adjust position. This makes it possible to arrange them between parts that move relative to one another during operation of the machine tool. These movements can be highly dynamic.
  • the protective cover 10 has a fold element 12 which extends over its entire length and which, in the exemplary embodiment, consists of a PP material.
  • the fold layers of every second fold are fastened flat to one another to form intermediate folds 16, which can be done by stitching (sewing), gluing, riveting or welding. This creates kinks 18 at which the two fold layers of the intermediate folds 16 are angled at 180° to one another.
  • the fold element 12 can also be designed without openings over its entire length in the area of the intermediate folds, that is, it offers a hermetic closure between two end strips 22, 24, to which the two end fold layers 26 of the fold element 12 are fixed with the aid of rivet strips 27.
  • Regular folds 14 are formed between the intermediate folds 16, which unfold when the protective element is pulled apart, whereby in the maximally unfolded, ie stretched, state they act as a pull-out safeguard and limit the maximum distance between the intermediate folds 16 from one another.
  • lamella elements 20 made of metal or plastic overlap in a scale/telescopic manner and have a substantially L-shaped cross section.
  • Short legs 28 serve to fasten the lamella elements 20 to the free ends of the intermediate folds 16 in the area of the kinks 18, while the legs 30 angled in the direction of extension of the protective element 10 have a length that is greater than the distance between two intermediate folds 16 when extended to the maximum Condition of the fold element 12. This ensures that the lamella elements 20 overlap with their legs 30 like scales, so that the lamella elements 20 can be pulled apart or pushed together telescopically. This means that the lamella elements 20 can also adapt flexibly to the change in length of the protective element 10.
  • the lamella elements 20 have a transition region 32 between the short legs 28 and the long legs 30 of the lamella element 20 (see also Fig. 6 ), which is provided with recesses 34 through which fastening clips (not shown) can be attached to the short legs 28. These clips cling to the fold element material from both sides, with openings 36 for the teeth of the fastening clips being made in the short legs 28.
  • the attachment of the slat elements 20 to the intermediate folds can also be solved in another way, for example by stitching the short legs 28 with the intermediate folds 16. Gluing is also possible; in the case of plastic slats, welding is also conceivable.
  • Fig. 1 Two mounting strips 38 can still be seen, but they are only used to mount the lamella elements 20 on the intermediate folds 16 and are removed before installing the protective cover in a machine tool.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)

Description

Die Erfindung betrifft gemäß dem Oberbegriff von Anspruch 1 eine längenvariable Schutzabdeckung, die wenigstens ein Faltenelement mit einer Vielzahl an Falten aufweist, wobei das Faltenelement in regelmäßigen Abständen als Zwischenfalten ausgebildete Falten aufweist, die aus zwei flächig aufeinander liegenden Faltenlagen einer Falte mit einer Knickstelle bestehen und an denen Lamellenelemente festgelegt sind, die im Querschnitt L-förmig ausgebildet sind, wobei jeweils ein Schenkel an der Zwischenfalte festgelegt ist, während die Schenkel sich teleskopartig überlappen.According to the preamble of claim 1, the invention relates to a variable-length protective cover which has at least one fold element with a plurality of folds, the fold element having folds formed at regular intervals as intermediate folds, which consist of two fold layers lying flat on top of one another of a fold with a bend point and on which lamella elements are fixed, which are L-shaped in cross section, with one leg being fixed to the intermediate fold, while the legs overlap telescopically.

Eine derartige Schutzabdeckung ist aus einer speziellen Ausführungsform der DE 10 2016 103 985 A1 bekannt. Dort sind die Lamellen zwischen den taschenartig verbundenen Faltenlagen der verkürzt ausgeführten Zwischenfalten des Faltenelements angebracht, d.h. die Lamellen überlappen auch auf der Seite der Schutzabdeckung, auf welcher die regulären Falten des Faltenelements angeordnet sind, während die Zwischenfalten frei nach außen ragen. Diese Ausführungsform ermöglicht es bereits, die Lamellen sicher unmittelbar an dem Faltenelement festzulegen. Die Anordnung in den Taschen bedingt aber dann eine aufwändigere Fertigung der Schutzabdeckung. Zum einen können die Zwischenfalten meist erst dann fertig ausgebildet werden, wenn auch die Lamellen in die dabei entstehenden Taschen eingebracht und festgelegt werden. Zum anderen ist es aufwändig, die Zwischenfalten verkürzt auszubilden, da das Faltenelement nicht in der üblichen Standardfaltung eingesetzt werden kann. Ungünstig kann je nach Anwendung auch sein, dass die Zwischenfalten nach außen überstehen, was optisch als nachteilig wahrgenommen wird und auch die Reinigung erschweren kann. Ein Einsatzgebiet derartiger Schutzabdeckungen sind Werkzeugmaschinen, bei denen sich die Zugangsöffnungen zu Arbeitsräumen im Betrieb dynamisch ändern. Die Schutzabdeckungen verhindern, dass umherfliegende Späne und austretendes Schneidfluid die Umgebung gefährden.Such a protective cover is from a special embodiment DE 10 2016 103 985 A1 known. There the slats are attached between the pocket-like fold layers of the shortened intermediate folds of the fold element, ie the slats also overlap on the side of the protective cover on which the regular folds of the fold element are arranged, while the intermediate folds protrude freely outwards. This embodiment already makes it possible to securely attach the slats directly to the folding element. However, the arrangement in the pockets then requires more complex production of the protective cover. On the one hand, the intermediate folds can usually only be fully formed then if the slats are also inserted and fixed in the resulting pockets. On the other hand, it is complex to make the intermediate folds shortened, since the fold element cannot be used in the usual standard fold. Depending on the application, it can also be unfortunate that the intermediate folds protrude outwards, which is visually perceived as disadvantageous and can also make cleaning more difficult. One area of application for such protective covers is machine tools in which the access openings to work areas change dynamically during operation. The protective covers prevent flying chips and escaping cutting fluid from endangering the environment.

Aus der JP2008-12639A ist eine längenvariable Schutzabdeckung bekannt, bei der die Befestigung an starren Zwischenelementen erfolgt, an denen Abschnitte von Falten des Faltenelements ebenso wie die Schenkel von Lamellen angebracht sind.From the JP2008-12639A a variable-length protective cover is known, in which the attachment takes place on rigid intermediate elements, to which sections of folds of the fold element as well as the legs of slats are attached.

Die DE 20 2009 006 306 U1 zeigt eine Schutzabdeckung mit einem Faltenbalge mit starren Zwischenelementen, an denen beidseitig auskragende Lamellen angebracht sind, die die Durchbiegung des Behanges vermindern helfen.The DE 20 2009 006 306 U1 shows a protective cover with a bellows with rigid intermediate elements, to which cantilevered slats are attached on both sides, which help to reduce the deflection of the curtain.

Die DE 16 66 445 U zeigt einen zwei Faltenbalgelemente ohne schützende Lamellen, die stirnseitig miteinander verbunden sind.The DE 16 66 445 U shows two bellows elements without protective slats, which are connected to each other at the front.

Die EP 1 842 620 A1 zeigt einen Faltenbalg, bei welchem Abschnitte der Falten mit Zwischenwandelementen verbunden sind.The EP 1 842 620 A1 shows a bellows in which sections of the folds are connected to intermediate wall elements.

Die DE 20 2017 004 433 U1 zeigt eine Schutzvorrichtung mit einer Vielzahl von Lamellen und einem Abschirmbauglied aus elastischem Stoff, das in Verbindungsendabschnitten an den Lamellen befestigt ist.The DE 20 2017 004 433 U1 shows a protective device having a plurality of slats and a shielding member made of elastic fabric attached to the slats in connecting end portions.

Die Aufgabe der Erfindung besteht darin, eine Schutzabdeckung zu schaffen, die mit einer bestimmten Anzahl an Lamellen einen maximalen Hub abdecken kann.The object of the invention is to create a protective cover that can cover a maximum stroke with a certain number of slats.

Hauptmerkmale der Erfindung sind im kennzeichnenden Teil von Anspruch 1 angegeben. Ausgestaltungen sind Gegenstand der Ansprüche 2 bis 9.Main features of the invention are set out in the characterizing part of claim 1. Refinements are the subject of claims 2 to 9.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, dass zwischen den Zwischenfalten (16) reguläre Falten (14) ausgebildet sind und die Zwischenfalten (16) die gleiche Kantenlänge wie die übrigen regulären Falten des Faltenelements besitzen. Dies hat den Vorteil, dass Standardfaltungen des Faltenelements eingesetzt werden können, bei denen im Ausgangszustand alle Falten gleich ausgebildet sind. Die Zwischenfalten werden dann hergestellt, indem bestimmte Faltenlagen, vorzugsweise die benachbarten Faltenlagen jeder zweiten Falte des gefalteten Ausgangsmaterials, flach miteinander verbunden werden.The object is achieved according to the invention in that regular folds (14) are formed between the intermediate folds (16) and the intermediate folds (16) have the same edge length as the remaining regular folds of the fold element. This has the advantage that standard folds of the fold element can be used, in which all folds are formed the same in the initial state. The intermediate folds are then made, by connecting certain fold layers, preferably the adjacent fold layers of every second fold of the folded starting material, flat to one another.

Es hat sich gezeigt, dass sich durch diese Anordnung die Ausziehlänge des Faltenelements und damit der gesamten Schutzabdeckung maximieren lässt, da die regulären Falten des Behanges praktisch bis zu ihrer gestreckten Lage aufgefaltet werden können, ohne dass dies die Betriebssicherheit einschränkt. Insgesamt ergibt sich auch ohne zusätzliche Rahmen- oder Stützelemente eine hohe Stabilität durch die auf einer Seite der Schutzabdeckung überlappenden Lamellen und die auf der anderen Seite liegenden regulären Falten, wobei die Lamellen und die regulären Falten des Faltenelements durch die wie verstärkende Querrippen wirkenden Zwischenfalten verbunden sind. Vorteilhaft ist auch, dass die regulären Falten an den den Anbringungsstellen der Lamellen gegenüberliegenden Enden der Zwischenfalten liegen, so dass durch die federnd überlappenden Lamellen entstehende Momente besser innerhalb der Schutzabdeckung aufgenommen werden können.It has been shown that this arrangement allows the extension length of the fold element and thus of the entire protective cover to be maximized, since the regular folds of the curtain can practically be unfolded to their stretched position without this restricting operational safety. Overall, even without additional frame or support elements, there is a high level of stability due to the slats overlapping on one side of the protective cover and the regular folds on the other side, with the slats and the regular folds of the fold element being connected by the intermediate folds that act like reinforcing transverse ribs . It is also advantageous that the regular folds lie at the ends of the intermediate folds opposite the attachment points of the slats, so that moments arising from the resiliently overlapping slats can be better absorbed within the protective cover.

Das Verbinden kann vorzugsweise in der Weise erfolgen, dass die Faltenlagen der Zwischenfalten miteinander vernäht, verklebt, verschweißt oder vernietet sind.The connection can preferably be carried out in such a way that the fold layers of the intermediate folds are sewn, glued, welded or riveted together.

Für den Fall, dass die Schutzabdeckung keine ausreichende Eigensteifigkeit aufweisen sollte oder das Vorsehen von Gleitelementen zum Zusammenwirken mit Führungsbahnen, die an den Rändern der Öffnung zu einem Arbeitsraum eine Werkzeugmaschine vorgesehen sein können, ist in einer weiteren Ausgestaltung der Erfindung vorgesehen, dass an den Zwischenfalten Rahmenelemente angebracht sind.In the event that the protective cover does not have sufficient inherent rigidity or the provision of sliding elements for interaction with guide tracks, which can be provided at the edges of the opening to a working space of a machine tool, it is provided in a further embodiment of the invention that at the intermediate folds Frame elements are attached.

Die Anbindung der Lamellenelemente oder auch der ggf. vorhandenen Rahmen- oder Stützelemente an das Faltenelement kann in der Weise gelöst werden, dass die Lamellenelemente und/oder die Rahmenelemente mit dem Faltenelement im Bereich der Knickstellen an den Zwischenfalten verklebt, vernietet, verclipst, vernietet oder verschweißt sind.The connection of the slat elements or of any existing frame or support elements to the pleated element can be achieved in such a way that the slat elements and/or the frame elements are glued, riveted, clipped, riveted or welded to the pleated element in the area of the bends at the intermediate folds.

In einer bevorzugten Ausführungsform ist vorgesehen, dass das Material des wenigstens einen Faltenelements ein- oder mehrlagig aus Gewebe und/oder Kunststoffe und/oder Mischformen aus Geweben und Kunststoffen ausgebildet ist.In a preferred embodiment it is provided that the material of the at least one fold element is formed in one or more layers from fabric and/or plastics and/or mixed forms of fabrics and plastics.

Die genaue Auswahl richtet sich hierbei nach den Anforderungen des Anwendungsfalls, z.B. der dynamischen Beanspruchung oder dem Einsatz in einer aggressiven Umgebung.The exact selection depends on the requirements of the application, e.g. dynamic stress or use in an aggressive environment.

In einer besonders bevorzugten Ausführungsform der Erfindung ist das Faltenelement als Faltenbalg ausgebildet, der sich über die gesamte Fläche der Schutzabdeckung erstreckt.In a particularly preferred embodiment of the invention, the fold element is designed as a bellows which extends over the entire surface of the protective cover.

Diese Lösung hat den Vorteil, dass die einem Arbeitsraum zugewandten Lamellenelemente nach außen hin vollständig von dem Faltenbalg abgedeckt wird. Dies schützt die Umgebung zusätzlich gegen austretende Stoffe, wobei es zur weiteren Verbesserung dieser Eigenschaft besonders bevorzugt ist, dass das Faltenelement frei von Durchbrüchen oder Löchern ist.This solution has the advantage that the lamella elements facing a working space are completely covered from the outside by the bellows. This additionally protects the environment against escaping substances, and in order to further improve this property it is particularly preferred that the fold element is free of openings or holes.

In einer noch weiteren bevorzugten Ausführungsform der Erfindung wird das Schutzelement ohne die ansonsten üblichen Auszugssicherungen konzipiert, die die Lamellenelemente vor einem übermäßigen Auseinanderziehen schützen, wobei die regulären Falten des Faltenelements in der maximal ausgefahrenen Position der Schutzabdeckung als Auszugsbegrenzung wirken. Hierdurch wird die Teilezahl vermindert und das Gewicht der Schutzabdeckung reduziert, was bei hohen dynamischen Beanspruchungen von Vorteil ist. Die regulären Falten falten sich selbst nach einem maximalen gestreckten Ausziehen infolge der Elastizitätseigenschaften des Materials beim Verkürzen der Länge der Schutzabdeckung wieder zusammen. Durch die Ausnutzung der maximalen Streckbarkeit der regulären Falten kann die Schutzabdeckung insgesamt mit einer Minimalzahl an Falten und Zwischenfalten ausgebildet werden, so dass sich neben dem Gewicht auch die Herstellungskosten minimieren lassen.In a still further preferred embodiment of the invention, the protective element is designed without the otherwise usual pull-out safeguards, which protect the lamella elements from being pulled apart excessively, with the regular folds of the fold element acting as a pull-out limiter in the maximum extended position of the protective cover. This reduces the number of parts and reduces the weight of the protective cover, which is an advantage under high dynamic loads. The regular folds fold back together even after maximum stretching due to the elastic properties of the material when the length of the protective cover is shortened. By utilizing the maximum stretchability of the regular folds, the protective cover can be designed overall with a minimum number of folds and intermediate folds, so that not only the weight but also the manufacturing costs can be minimized.

Als besonders zweckmäßig hat sich eine Ausführungsform der Erfindung erwiesen, bei welcher jede zweite Falte des Faltenelements als Zwischenfalte ausgebildet ist. Es sind aber auch Ausführungsformen möglich, bei denen nur jede dritte oder vierte Falte als Zwischenfalte ausgebildet ist.An embodiment of the invention has proven to be particularly useful, in which every second fold of the fold element is designed as an intermediate fold. However, embodiments are also possible in which only every third or fourth fold is designed as an intermediate fold.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus dem Wortlaut der Ansprüche sowie aus der folgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnungen. Es zeigen:

Fig. 1
eine Ansicht einer längenvariablen Schutzabdeckung;
Fig. 2
einen Längsschnitt (verkürzt) der Schutzabdeckung nach Fig. 1;
Fig. 3
eine vergrößerte Einzelheit A aus Fig. 2;
Fig. 4
eine vergrößerte Einzelheit B aus Fig. 2;
Fig. 5
eine vergrößerte Einzelheit C aus Fig. 2;
Fig. 6
eine ausgeschnittene Draufsicht auf eine Schutzabdeckung mit zwei entfernten Lamellenelemente.
Further features, details and advantages of the invention emerge from the wording of the claims and from the following description of exemplary embodiments based on the drawings. Show it:
Fig. 1
a view of a variable length protective cover;
Fig. 2
a longitudinal cut (shortened) of the protective cover Fig. 1 ;
Fig. 3
an enlarged detail A Fig. 2 ;
Fig. 4
an enlarged detail B Fig. 2 ;
Fig. 5
an enlarged detail C Fig. 2 ;
Fig. 6
a cut-out top view of a protective cover with two slat elements removed.

In Fig. 1 ist eine längenvariable Schutzabdeckung 10 gezeigt, wie sie zur Abdeckung von Arbeitsräumen von Werkzeugmaschinen (nicht gezeigt) eingesetzt wird. Die Schutzabdeckung 10 lässt sich in ihrer Länge zwischen einer maximal gestauchten und einer maximal auseinandergezogenen Stellung verstellen. Dadurch ist es möglich, sie zwischen im Betrieb der Werkzeugmaschine relativ zueinander bewegten Teilen anzuordnen. Diese Bewegungen können hochdynamisch sein.In Fig. 1 a variable-length protective cover 10 is shown, as used to cover work spaces of machine tools (not shown). The length of the protective cover 10 can vary between being maximally compressed and maximally pulled apart Adjust position. This makes it possible to arrange them between parts that move relative to one another during operation of the machine tool. These movements can be highly dynamic.

Die Schutzabdeckung 10 besitzt ein sich über ihre gesamte jeweilige Länge erstreckendes Faltenelement 12, das bei dem Ausführungsbeispiel aus einem PP-Material besteht. Wie insbesondere auch aus Fig. 2 gut zu erkennen ist, werden bei dem ursprünglich gleichmäßig gefalteten Faltenelement 12 die Faltenlagen jeder zweiten Faltung flach zur Bildung von Zwischenfalten 16 aufeinander befestigt, was durch Versteppen (Vernähen), Verkleben, Vernieten oder Verschweißen erfolgen kann. Dabei entstehen Knickstellen 18, an denen die beiden Faltenlagen der Zwischenfalten 16 um 180° zueinander abgewinkelt sind. Das Faltenelement 12 kann über seine gesamte Länge auch im Bereich der Zwischenfalten ohne Durchbrüche ausgebildet sein, d.h. es bietet einen hermetischen Verschluss zwischen zwei Endleisten 22, 24, an denen die beiden Endfaltenlagen 26 des Faltenelements 12 mit Hilfe von Nietleisten 27 festgelegt sind. Zwischen den Zwischenfalten 16 sind reguläre Falten 14 ausgebildet, die sich beim Auseinanderziehen des Schutzelements auffalten, wobei sie im maximal aufgefalteten, d.h. gestreckten Zustand als Auszugssicherung wirken und den maximalen Abstand der Zwischenfalten 16 zueinander begrenzen.The protective cover 10 has a fold element 12 which extends over its entire length and which, in the exemplary embodiment, consists of a PP material. Like in particular Fig. 2 can be clearly seen, in the originally evenly folded fold element 12, the fold layers of every second fold are fastened flat to one another to form intermediate folds 16, which can be done by stitching (sewing), gluing, riveting or welding. This creates kinks 18 at which the two fold layers of the intermediate folds 16 are angled at 180° to one another. The fold element 12 can also be designed without openings over its entire length in the area of the intermediate folds, that is, it offers a hermetic closure between two end strips 22, 24, to which the two end fold layers 26 of the fold element 12 are fixed with the aid of rivet strips 27. Regular folds 14 are formed between the intermediate folds 16, which unfold when the protective element is pulled apart, whereby in the maximally unfolded, ie stretched, state they act as a pull-out safeguard and limit the maximum distance between the intermediate folds 16 from one another.

Zum Arbeitsraum der Werkzeugmaschine hin sind schuppen-/teleskopartig überlappende Lamellenelemente 20 aus Metall oder Kunststoff vorgesehen, die einen im Wesentlichen L-förmigen Querschnitt besitzen. Kurze Schenkel 28 dienen dabei der Befestigung der Lamellenelemente 20 an den freien Enden der Zwischenfalten 16 im Bereich der Knickstellen 18, während die in der Erstreckungsrichtung des Schutzelements 10 abgewinkelten Schenkel 30 eine Länge aufweisen, die größer ist als der Abstand zweier Zwischenfalten 16 im maximal ausgezogenen Zustand des Faltenelements 12. Dadurch ist sichergestellt, dass sich die Lamellenelemente 20 mit ihren Schenkeln 30 schuppenartig überlappen, so dass die Lamellenelemente 20 teleskopartig auseinandergezogen bzw. zusammengeschoben werden können. Damit können sich auch die Lamellenelemente 20 der Längenänderung des Schutzelements 10 flexibel anpassen. Die Lamellenelemente 20 besitzen zwischen den kurzen Schenkeln 28 und den langen Schenkeln 30 der Lamellenelement 20 ist jeweils ein Übergangsbereich 32 vorgesehen (siehe auch Fig. 6), der mit Ausnehmungen 34 versehen ist, durch welche Befestigungsclips (nicht gezeigt) auf die kurzen Schenkel 28 aufsteckbar sind. Diese Clips verkrallen sich von beiden Seiten mit dem Faltenelementmaterial, wobei hierzu in den kurzen Schenkeln 28 Öffnungen 36 für die Zähne der Befestigungsclips eingebracht sind.Towards the working space of the machine tool, lamella elements 20 made of metal or plastic overlap in a scale/telescopic manner and have a substantially L-shaped cross section. Short legs 28 serve to fasten the lamella elements 20 to the free ends of the intermediate folds 16 in the area of the kinks 18, while the legs 30 angled in the direction of extension of the protective element 10 have a length that is greater than the distance between two intermediate folds 16 when extended to the maximum Condition of the fold element 12. This ensures that the lamella elements 20 overlap with their legs 30 like scales, so that the lamella elements 20 can be pulled apart or pushed together telescopically. This means that the lamella elements 20 can also adapt flexibly to the change in length of the protective element 10. The lamella elements 20 have a transition region 32 between the short legs 28 and the long legs 30 of the lamella element 20 (see also Fig. 6 ), which is provided with recesses 34 through which fastening clips (not shown) can be attached to the short legs 28. These clips cling to the fold element material from both sides, with openings 36 for the teeth of the fastening clips being made in the short legs 28.

Die Anbringung der Lamellenelemente 20 an den Zwischenfalten kann auch auf andere Weise gelöst werden, beispielsweise durch ein Versteppen der kurzen Schenkel 28 mit den Zwischenfalten 16. Auch ein Verkleben ist möglich, im Falle von Kunststofflamellen ist auch ein Verschweißen denkbar.The attachment of the slat elements 20 to the intermediate folds can also be solved in another way, for example by stitching the short legs 28 with the intermediate folds 16. Gluing is also possible; in the case of plastic slats, welding is also conceivable.

In Fig. 1 sind noch zwei Montageleisten 38 zu erkennen, die aber nur zur Montage der Lamellenelemente 20 an den Zwischenfalten 16 genutzt werden und vor dem Einbau der Schutzabdeckung in eine Werkzeugmaschine entfernt werden.In Fig. 1 Two mounting strips 38 can still be seen, but they are only used to mount the lamella elements 20 on the intermediate folds 16 and are removed before installing the protective cover in a machine tool.

BezugszeichenlisteReference symbol list

1010
SchutzabdeckungProtective cover
1212
FaltenelementFold element
1414
Reguläre FaltenRegular wrinkles
1616
ZwischenfaltenIntermediate folds
1818
Knickstellenkinks
2020
LamellenelementSlat element
2222
EndleisteEnd bar
2424
EndleisteEnd bar
2626
EndfaltenlageEnd fold position
2727
Nietleistenrivet strips
2828
Kurze SchenkelShort thighs
3030
Überlappende SchenkelOverlapping legs
3232
ÜbergangsbereicheTransition areas
3434
Ausnehmungenrecesses
3636
Öffnungenopenings
3838
MontageleistenMounting strips

Claims (9)

  1. Variable-length protective cover (10) which has at least one fold element (12) having a plurality of folds (14, 16), wherein the fold element (12) has folds which are designed as intermediate folds (16) at regular spacing intervals and which consist of two fold layers of a fold, lying flat atop each other, having a kink point (18), and to which lamellar elements (20) are fixed which have L-shaped cross-sections, wherein one limb (28) is fixed to the intermediate fold (16), while the other limbs (30) telescopically overlap, wherein the lamellar elements (20) are attached in the region of the kink points (18) of the intermediate folds (16), characterised in that regular folds (14) are formed between the intermediate folds (16) and the intermediate folds (16) have the same edge length as the other regular folds (14) of the fold element (12).
  2. Variable-length protective cover according to claim 1, characterised in that the fold layers of the intermediate folds (16) are sewn, glued, welded or riveted together.
  3. Variable-length protective cover according to any one of the preceding claims, characterised in that frame elements are attached to the intermediate folds (16).
  4. Variable-length protective cover according to any one of the preceding claims, characterised in that the lamellar elements (20) and/or the frame elements are glued, riveted, clipped, riveted or welded to the fold element (12) in the region of the kink points (18) at the intermediate folds (16).
  5. Variable-length protective cover according to any one of the preceding claims, characterised in that the material of the at least one fold element (12) is formed in one or more layers from woven fabric and/or plastics and/or mixed forms consisting of woven fabrics and plastics.
  6. Variable-length protective cover according to any one of the preceding claims, characterised in that the fold element (12) is designed as a bellows which extends over the entire width of the protective cover (10).
  7. Variable-length protective cover according to claim 6, characterised in that the fold element (12) is free of perforations or holes.
  8. Variable-length protective cover according to any one of the preceding claims, characterised in that the regular folds (14) of the fold element (12) act as an extension limit in the maximally extended position of the protective cover (10).
  9. Variable-length protective cover according to any one of the preceding claims, characterised in that every second fold of the fold element (12) is formed as an intermediate fold (16).
EP19722886.9A 2018-05-08 2019-05-07 Variable length protective cover Active EP3790704B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018111042.1A DE102018111042A1 (en) 2018-05-08 2018-05-08 Variable length protective cover
PCT/EP2019/061737 WO2019215191A1 (en) 2018-05-08 2019-05-07 Variable length protective cover

Publications (3)

Publication Number Publication Date
EP3790704A1 EP3790704A1 (en) 2021-03-17
EP3790704C0 EP3790704C0 (en) 2024-03-27
EP3790704B1 true EP3790704B1 (en) 2024-03-27

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ID=66448568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19722886.9A Active EP3790704B1 (en) 2018-05-08 2019-05-07 Variable length protective cover

Country Status (3)

Country Link
EP (1) EP3790704B1 (en)
DE (1) DE102018111042A1 (en)
WO (1) WO2019215191A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2512916A (en) 2013-04-11 2014-10-15 Nujira Ltd Output stage for class AB amplifier
CN111906362A (en) * 2020-07-10 2020-11-10 按钮科技(杭州)有限公司 Milling machine protection mechanism
DE102021102662A1 (en) 2021-02-04 2022-08-04 Hema Maschinen- Und Apparateschutz Gmbh Protective cover with a bellows and fins attached to it
CN116494010B (en) * 2023-06-25 2023-09-19 四川托璞勒科技有限公司 Dust blocking assembly, pressing mechanism and cutting machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1666445U (en) * 1953-05-06 1953-11-05 Arnold Hennig HARMONIC-SHAPED FOLDED COVER TO PROTECT THE GUIDEWAY OF TO AND OUTPUT PARTS OF MACHINERY MACHINES.
DE102006015799B4 (en) * 2006-04-03 2009-11-12 Gebr. Heller Maschinenfabrik Gmbh Cover for machine guides
JP4751256B2 (en) * 2006-07-07 2011-08-17 株式会社ナベル bellows
DE202009006306U1 (en) * 2009-04-29 2010-09-16 Hema Maschinen- Und Apparateschutz Gmbh bellow
DE202015001696U1 (en) * 2015-03-05 2016-06-09 Hema Maschinen- Und Apparateschutz Gmbh Variable length protective cover with folding element
EP3184236B1 (en) * 2015-12-21 2019-02-20 Möller Werke GmbH Extendable covering
DE202017004433U1 (en) * 2017-08-24 2017-09-06 Sun Yuan Technology Co., Ltd. guard

Also Published As

Publication number Publication date
WO2019215191A1 (en) 2019-11-14
EP3790704C0 (en) 2024-03-27
DE102018111042A1 (en) 2019-11-14
EP3790704A1 (en) 2021-03-17

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